1st Canadian Brigade 1st Canadian Infantry Brigade
Active	1914–1919 1939–1945
Country	Canada
Branch	Canadian Army
Type	Infantry
Size	Brigade
Part of	1st Canadian Division
Engagements	World War I Second Battle of Ypres Battle of the Somme Battle of Vimy Ridge Battle of Passchendaele World War II Invasion of Sicily Italian campaign
Commanders
Notable commanders	Malcolm Mercer William Antrobus Griesbach

The 1st Canadian Infantry Brigade was a Canadian Army formation that served with the 1st Canadian Division in World Wars I and II. In 1953 it was reformed in Germany to become the 1 Canadian Mechanized Brigade Group in 1992.

William Antrobus Griesbach commanded the brigade in 1918.

• 1st Canadian Battalion (Ontario Regiment), CEF. August 1914 – November 11, 1918;
• 2nd Canadian Battalion (Eastern Ontario Regiment), CEF. August 1914 – November 11, 1918;
• 3rd Canadian Battalion (Toronto Regiment), CEF. August 1914 – November 11, 1918;
• 4th (Central Ontario) Battalion, CEF. August 1914 – November 11, 1918.^[1]

• The Royal Canadian Regiment
• The Hastings and Prince Edward Regiment
• 48th Highlanders of Canada
• 1st Canadian Infantry Brigade Ground Defence Platoon (Lorne Scots)^[2]

The brigade was re-established on 14 October 1953 in Europe.^[3]

• 1st Canadian Infantry Brigade created 14 October 1953
• Redesignated 1st Canadian Infantry Brigade Group in October 1955
• Redesignated 1 Combat Group in 1972
• Redesignated 1 Canadian Brigade Group in 1976
• Redesignated 1 Canadian Mechanized Brigade Group in 1992